Abstract: The supersonic ejector utilized for cooling includes a cooling extension axially extending the discharge slot from the throat of the primary stream and is contoured to accelerate primary stream, to direct the primary stream to flow parallel to the secondary stream and match the static pressures of both streams and to ensure that the expansion shocks are upstream of the discharge slot. This supersonic ejector is utilized in one instance for cooling purposes in a two-dimensional vectoring nozzle of a gas turbine engine powering aircraft.

Abstract: Cooling of the hot surfaces of the exhaust nozzle of a fan jet engine and purging of the nacelle is attained by a booster pump mounted in exhaust nozzle structure and the booster pump having an ejector driven by localized fan air existing in the engine cooling path extracted from the fan of the engine for pumping nacelle air and mixing the egressing fluid in a mixing chamber and diffuser disposed in fluid communication with booster pump which is then dumped into a plenum within the exhaust nozzle structure for feeding film cooling holes formed in the hot surfaces for laying a blanket of cooling air along the gas path surface of the exhaust nozzle.